+ Jimmies sprinkles are long sprinkles available from cake decorating stores. You could use bright or sugar strand sprinkles instead. + The icing will start to firm up on standing because of the copha. If the mixture becomes too firm to spread, simply add a little more warm milk and beat with a wooden spoon until spreadable. + For a quick and easy way to press jimmies on cake, spray a thin line of cooking oil spray along the base of a sheet of baking paper. Sprinkle with jimmies so they stick to the oil. Shake off any excess. Lift paper and press around base of the cake to secure the sprinkles. Repeat where necessary.